<template>
 <el-aside :width="width">
      
      <el-menu 
      background-color="#545c64"
      text-color="#fff"
      :collapse-transition="false" 
      :collapse="isCollapse">
          
        <h3 v-show="!isCollapse">后台管理</h3>
        <h3 v-show="isCollapse">后台</h3>
        <el-menu-item
          :index="item.path"
          v-for="item in noChildren"
          :key="item.path"
          @click="clickMenu(item)"
        >
        <component class="icons" :is="item.icon"></component>
        <span>{{ item.label }}</span>
        </el-menu-item>
         
        <el-sub-menu
          v-for="item in hasChildren"
          :key="item.path"
          :index="item.path"
        >
          <template #title>
              <component class="icons" :is="item.icon"></component>
              <span>{{ item.label }}</span>
          </template>
  
          <el-menu-item-group>
              
            <el-menu-item
              :index="subItem.path"
              v-for="(subItem, subIndex) in item.children"
              :key="subIndex"
              @click="clickMenu(subItem)"
            >
              <component class="icons" :is="subItem.icon"></component>
              <span>{{ subItem.label }}</span>
            </el-menu-item>
              
          </el-menu-item-group>
  
        </el-sub-menu>
        </el-menu>
  
  </el-aside>
</template>

<script setup>

import { ref, computed } from "vue";
import { useRouter } from "vue-router";
import { useAllDataStore } from '@/stores'
const router=useRouter()
//这个store和vuex的差不多
const store=useAllDataStore()

//从pinia中取出isCollapse
const isCollapse =computed(() => store.state.isCollapse)
//width也是通过判断isCollapse动态决定
const width =computed(() => store.state.isCollapse? "64px" : "180px")

const clickMenu=(item)=>{
    //这个selectMenu 相当于vuex的action方法，传入item，用于头部的面包屑
    store.selectMenu(item)
    router.push(item.path)
}

const list =ref([
      	{
          path: '/home',
          name: 'home',
          label: '首页',
          icon: 'house',
          url: 'Home'
      	},
        {
            path: '/mall',
            name: 'mall',
            label: '商品管理',
            icon: 'video-play',
            url: 'Mall'
        },
        {
            path: '/user',
            name: 'user',
            label: '用户管理',
            icon: 'user',
            url: 'User'
        },
        {
            path: 'other',
            label: '其他',
            icon: 'location',
            children: [
                {
                    path: '/page1',
                    name: 'page1',
                    label: '页面1',
                    icon: 'setting',
                    url: 'Page1'
                },
                {
                    path: '/page2',
                    name: 'page2',
                    label: '页面2',
                    icon: 'setting',
                    url: 'Page2'
                }
            ]
        }
])
const noChildren = computed(() => list.value.filter(item => !item.children))
const hasChildren =computed(() => list.value.filter(item => item.children))

</script>
<style lang="less" scoped >
.icons {
  width: 18px;
  height: 18px;
  margin-right: 5px;
}
.el-menu {
  border-right: none;
  h3 {
    line-height: 48px;
    color: #fff;
    text-align: center;
  }
}
.el-aside {
  height: 100%;
  background-color: #545c64;
}
</style>